Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Dec. 31, 2025	Mar. 16, 2026	Jun. 30, 2025
Document Information [Line Items]
Document Type	10-K/A
Document Annual Report	true
Document Period End Date	Dec. 31, 2025
Document Transition Report	false
Entity File Number	001-36210
Entity Registrant Name	LiqTech International, Inc.
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	20-1431677
Entity Address, Address Line One	Industriparken 22C
Entity Address, Postal Zip Code	DK 2750
Entity Address, City or Town	Ballerup
Entity Address, Country	DK
City Area Code	45
Local Phone Number	31315941
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	LIQT
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 9,702,533
Entity Common Stock, Shares Outstanding (in shares)		9,947,841
Amendment Description	This Amendment No. 1 to the Annual Report on Form 10-K (this “Amendment No. 1”) of LiqTech International, Inc. (“LiqTech” or the “Company”) amends the Company’s Annual Report on Form 10-K for the year ended December 31, 2025, which was filed with the Securities and Exchange Commission (“SEC”) on February 27, 2026 (the “Original Filing”). The Company is filing this Amendment No. 1 solely to file Part III (Items 10 through 14). This additional disclosure does not revise or alter the Company’s financial statements and any forward-looking statements contained in the Original Filing. Pursuant to Rule 12b-15 under the Exchange Act, this Amendment No. 1 contains new certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, which are attached hereto as exhibits to this Amendment No. 1.
Entity Central Index Key	0001307579
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	FY
Amendment Flag	true

LIQTECH INTERNATIONAL INC 10-K/A